





1891.] Entomology. 1141 
related structures, also the ciliated apparatus of the Ctenophore may 
be compared with the preoral ciliated band of the Trochophora. 
We would assume that the ccelom sacs and nephridial canals of the 
Zygoneura (sac-gonads of the Scolecida) are derived from the gastric 
canals of the Ctenophores, and therefore that the mid-gut of all 
Zygoneura may be compared morphologically only with the central 
stomach of the Ccelenterates in general and the Ctenophores in particu- 
lar, and not with the whole primitive digestive system of ccelenteric 
apparatus, as Lang has done.” 
ENTOMOLOGY.! 
«“ Biological Papers.’’—With this general title Prof. Charles 
Robertson, of Carlinville, Illinois, has recently distributed, under one 
cover, a series of admirable papers on flowers and insects, and 
descriptions of North America Hymenoptera. In his studies of the 
former subject the author has followed closely along the lines laid down 
by Müller in his ‘‘ Fertilization of Flowers,’’ describing the structural 
peculiarities of the blossom of each plant considered, and the relative 
time of development of each part, and cataloguing both the species 
of insect visitors and the object of their visit. The length of these 
catalogues indicates an amount of careful field work which will be best 
appreciated by those who have tried it. 
Lepidoptera of Buffalo.—The last number of the Bulletin of 
the Buffalo Society of Natural History contains an excellent ‘ List of 
Macro-Lepidoptera of Buffalo and Vicinity” by Edward P. Van 
ara tion . the author has been assisted by Dr. D. S. 
lman, Mr. Philip Fisher, and other members 
st -jticludes the Geometridz and Pyralidz, but 
omits the Tortricidyy and Tineide. The total number of species is 
777, of which 361 Wre Noctuide. The same issue of the Bulletin 
contains an account’ of ‘‘ Mill’s Collection of Fresh-Water Sponges,” 
by Dr. Kellicott. é 
Kerosene Emulsion.—In Bulletin No. 16 of the Michigan 
Experiment Station Prof. A. J. Cook discusses “‘ Kerosene Emulsion 
and Its Uses.” The article is evidently the result of a large amoun: 
of careful experimentation of the poa practical value, in which the 
+ Batted by Prof. C. M. Weed, Hanover, N. H: 




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